<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
  <h1>BMI身体质量指数测试</h1>
  <input type="text" placeholder="请输入身高(米)" v-model="h">
  <input type="text" placeholder="请输入体重(公斤)" v-model="w">
  <input type="button" value="测试" @click="f()">
  <h3>结果:{{result}}</h3>
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
    let v = new Vue({
        el:"body>div",
        data:{
          result:"",h:"",w:""
        },
        methods:{
          f() {
            // 发出异步请求
            axios.get("/bmi?h="+v.h+"&w="+v.w).then(function(response) {
                switch(response.data) {
                    case 1:
                        v.result="有点瘦了!"
                        break;
                    case 2:
                        v.result="身体健康!"
                        break;
                    case 3:
                        v.result="微微胖!"
                        break;
                    case 4:
                        v.result="有点胖了!"
                        break;
                }
            })
          }
        }
    })
</script>
</body>
</html>